Share 'Anything and Everything You Can Tell Me About Soy Foam Insulation?'

Hello,
I have a client interested in soy foam insulation. None of the insulators I have talked to have any experience with soy nor do they know anyone who uses it. I haven't researched it much yet but I thought I would throw out a discussion here. Anything pros and cons and experience with soy foam insulation would be much appreciated.
Thanks!
Eric Timon